ESB-2017.2866 - [Ubuntu] postgresql-common: Increased privileges - Existing account 2017-11-10

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2866
                     postgresql-common vulnerabilities
                             10 November 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           postgresql-common
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-8806 CVE-2016-1255 

Reference:         ESB-2017.2863
                   ESB-2017.2550
                   ASB-2016.0065

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3476-1

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Ubuntu Security Notice USN-3476-1
November 09, 2017

postgresql-common vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 17.10
- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

postgresql-common could be made to overwrite files as the administrator.

Software Description:
- - postgresql-common: PostgreSQL database-cluster manager

Details:

Dawid Golunski discovered that the postgresql-common pg_ctlcluster script
incorrectly handled symlinks. A local attacker could possibly use this
issue to escalate privileges. This issue only affected Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. (CVE-2016-1255)

It was discovered that the postgresql-common helper scripts incorrectly
handled symlinks. A local attacker could possibly use this issue to
escalate privileges. (CVE-2017-8806)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.10:
  postgresql-common               184ubuntu1.1

Ubuntu 17.04:
  postgresql-common               179ubuntu0.1

Ubuntu 16.04 LTS:
  postgresql-common               173ubuntu0.1

Ubuntu 14.04 LTS:
  postgresql-common               154ubuntu1.1

In general, a standard system update will make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3476-1
  CVE-2016-1255, CVE-2017-8806

Package Information:
  https://launchpad.net/ubuntu/+source/postgresql-common/184ubuntu1.1
  https://launchpad.net/ubuntu/+source/postgresql-common/179ubuntu0.1
  https://launchpad.net/ubuntu/+source/postgresql-common/173ubuntu0.1
  https://launchpad.net/ubuntu/+source/postgresql-common/154ubuntu1.1

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